103 lines
3.5 KiB
Python
103 lines
3.5 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2011 Canonical Ltd.
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# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Juerg Haefliger <juerg.haefliger@hp.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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##
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## The purpose of this script is to allow cloud-init to consume
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## rightscale style userdata. rightscale user data is key-value pairs
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## in a url-query-string like format.
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##
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## for cloud-init support, there will be a key named
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## 'CLOUD_INIT_REMOTE_HOOK'.
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##
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## This cloud-config module will
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## - read the blob of data from raw user data, and parse it as key/value
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## - for each key that is found, download the content to
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## the local instance/scripts directory and set them executable.
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## - the files in that directory will be run by the user-scripts module
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## Therefore, this must run before that.
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##
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##
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import os
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from cloudinit.settings import PER_INSTANCE
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from cloudinit import url_helper as uhelp
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from cloudinit import util
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from urlparse import parse_qs
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frequency = PER_INSTANCE
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MY_NAME = "cc_rightscale_userdata"
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MY_HOOKNAME = 'CLOUD_INIT_REMOTE_HOOK'
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def handle(name, _cfg, cloud, log, _args):
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try:
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ud = cloud.get_userdata_raw()
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except:
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log.debug("Failed to get raw userdata in module %s", name)
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return
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try:
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mdict = parse_qs(ud)
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if not mdict or not MY_HOOKNAME in mdict:
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log.debug(("Skipping module %s, "
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"did not find %s in parsed"
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" raw userdata"), name, MY_HOOKNAME)
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return
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except:
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util.logexc(log, ("Failed to parse query string %s"
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" into a dictionary"), ud)
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raise
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wrote_fns = []
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captured_excps = []
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# These will eventually be then ran by the cc_scripts_user
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# TODO(harlowja): maybe this should just be a new user data handler??
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# Instead of a late module that acts like a user data handler?
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scripts_d = cloud.get_ipath_cur('scripts')
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urls = mdict[MY_HOOKNAME]
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for (i, url) in enumerate(urls):
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fname = os.path.join(scripts_d, "rightscale-%02i" % (i))
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try:
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resp = uhelp.readurl(url)
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# Ensure its a valid http response (and something gotten)
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if resp.ok() and resp.contents:
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util.write_file(fname, str(resp), mode=0700)
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wrote_fns.append(fname)
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except Exception as e:
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captured_excps.append(e)
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util.logexc(log, "%s failed to read %s and write %s",
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MY_NAME, url, fname)
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if wrote_fns:
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log.debug("Wrote out rightscale userdata to %s files", len(wrote_fns))
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if len(wrote_fns) != len(urls):
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skipped = len(urls) - len(wrote_fns)
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log.debug("%s urls were skipped or failed", skipped)
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if captured_excps:
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log.warn("%s failed with exceptions, re-raising the last one",
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len(captured_excps))
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raise captured_excps[-1]
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